/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
Rename a Timeline. If bRenameNodes is true, will also rename any timeline nodes associated with this timeline
static bool RenameTimeline ( [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) * Blueprint, const [FName](API\Runtime\Core\UObject\FName) OldVarName, const [FName](API\Runtime\Core\UObject\FName) NewVarName )